What are the causes and consequences of a warming Earth?

Compounds which are found naturally in the earth are called: a. ores b. composites c. rocks d.minerals

These factors threaten north americas ecosystems

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation